Democratic mayoral candidate Bill de Blasio raised nearly twice as much money as his Republican rival Joe Lhota in recent weeks, according to financial filings last night.

De Blasio netted $627,023 between Aug. 27 and Monday, while Lhota added $335,843 to his coffers in the three-week period that overlapped the Sept. 10 primaries they won. De Blasio’s take included money that can’t be used for the general election because it was collected for a potential primary runoff that won’t be held.  The Democrat has a balance that can be spent of $704,157 to Lhota’s $497,296.

The fundraising advantage capped off a banner week for de Blasio, who held commanding leads in two polls and landed high-profile endorsements from party leaders and the city's top unions.

Lhota, who is seeking to close the gap, attacked de Blasio Friday on NYPD policies, accusing his opponent of a "flip-flop" and calling that a sign that the Democrat "has no soul."

The comments came after de Blasio said in a radio interview that a court-appointed monitor for the police department to reform stop-and-frisk practices -- which he has criticized -- may become unnecessary not long into his mayoralty because he would implement progressive policing strategies.

"We don't seek to have a monitor long term," he said.

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That amounts to a "flip-flop," Lhota asserted on Staten Island: "You can't have it both ways. You're either for a monitor or you're against a monitor."

De Blasio also said he had conferred with Police Commissioner Ray Kelly, and while they disagree on stop-and-frisk, he supported the NYPD's counterterrorism policies.

Sen. Charles Schumer endorsed de Blasio Friday outside Brooklyn's Borough Hall, saying he will ensure that his fellow Brooklynite is "elected by an overwhelming majority in November, winning every part of this city."

Schumer, however, dodged a question about one of de Blasio's signature proposals -- to impose higher taxes on New Yorkers earning more than $500,000 a year to fund programs such as prekindergarten. Schumer said it's not his job to dictate city policies.

Lhota has said he would pay for the education initiatives by finding budget savings. He has not said what he would cut.

Lhota picked up the endorsement of Staten Island Borough President James Molinaro, a Conservative Party member who initially had supported City Council Speaker Christine Quinn, a Democrat who lost her party's primary.

Molinaro praised Lhota's "great accomplishments" as a deputy for former Mayor Rudy Giuliani, "including the free ferry service . . . and the closure of the Fresh Kills landfill."

CLARIFICATION: An earlier version of this story said de Blasio had a campaign fund balance of $1,215,896 in the latest filings. That figure included contributions for a potential primary runoff, which won’t be held. Because such money cannot be used for the general election, de Blasio has about $704,000 that can be spent to Lhota’s $497,000.